grafana/src/app/services/backendSrv.js

define([
  'angular',
  'lodash',
  'config',
],
function (angular, _, config) {
  'use strict';

  var module = angular.module('grafana.services');

  module.service('backendSrv', function($http, alertSrv, $timeout) {
    var self = this;

    this.get = function(url, params) {
      return this.request({ method: 'GET', url: url, params: params });
    };

    this.delete = function(url) {
      return this.request({ method: 'DELETE', url: url });
    };

    this.post = function(url, data) {
      return this.request({ method: 'POST', url: url, data: data });
    };

    this.put = function(url, data) {
      return this.request({ method: 'PUT', url: url, data: data });
    };

    this._handleError = function(err) {
      if (err.status === 422) {
        alertSrv.set("Validation failed", "", "warning", 4000);
        throw err.data;
      }

      var data = err.data || { message: 'Unexpected error' };

      if (_.isString(data)) {
        data = { message: data };
      }

      data.severity = 'error';

      if (err.status < 500) {
        data.severity = "warning";
      }

      if (data.message) {
        alertSrv.set("Problem!", data.message, data.severity, 10000);
      }

      throw data;
    };

    this.request = function(options) {
      var httpOptions = {
        url: config.appSubUrl + options.url,
        method: options.method,
        data: options.data,
        params: options.params,
      };

      return $http(httpOptions).then(function(results) {
        if (options.method !== 'GET') {
          if (results && results.data.message) {
            alertSrv.set(results.data.message, '', 'success', 3000);
          }
        }
        return results.data;
      }, function(err) {
        $timeout(function() {
          if (err.isHandled) { return; }
          self._handleError(err);
        }, 50);

        throw err;
      });
    };

    this.search = function(query) {
      return this.get('/api/search', query);
    };

    this.getDashboard = function(slug) {
      return this.get('/api/dashboards/db/' + slug);
    };

    this.saveDashboard = function(dash, options) {
      options = (options || {});
      return this.post('/api/dashboards/db/', {dashboard: dash, overwrite: options.overwrite === true});
    };

  });
});